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Episode 145 - Photosynthesis

The Common Descent Podcast

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The Evolution of the Ear Canals

Fossils of ancient mammals show a shift from ecto thermic looking ear anatomy to endo thermic. This could have been a very critical or very connected feature to early mammal like that we didn't see in mammals. The study suggests the shift to warm bloodedness happened about 20 million years later than previous research has estimated. There will be more on marine reptiles and plesiosaurs next week.

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